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Histopathological appearance of osseous metaplasia in a colonic tubular adenoma. (A) Sections stained with haematoxylin and eosin showing a tubular adenoma with foci of metaplastic bone (original magnification, ×5). (B) Haematoxylin and eosin stained sections showing dysplastic colon glands with focal stromal osseous metaplasia (original magnification, ×20).
